The jewel in the crown of the Aragonese Pyrenees, popular with hikers and climbers, the Ordesa y Monte Perdido National Park encompasses four valleys: Ordesa, Añisclo, Pineta and Escuain. More or less accessible, they still offer the promise of impressive sights: grandiose canyons, fish-filled streams, sheer cliffs, exuberant vegetation, powerful waterfalls, in the shadow of Monte Perdido (3 355m).